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Questions tagged [high-current]

Say how much current is required, high-current means different things to different people.

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Does sealing low voltage high current fuse box from air exchange affect the current where the fuse blows?

I have a (Victron Energy) low voltage high current fuse box, which is intended for mega fuses such as 80A, 100A, 125A. Unfortunately, the fuse box has quite large holes where the thick cables go in, ...
juhist's user avatar
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-1 votes
0 answers
32 views

Current concept doubt (charging/discharging) [closed]

Current concept confuses me alot in electronics, have some questions regarding the same- Suppose my battery rating is 5V 1A (1000mAh) and suppose there is an Rpi to which i want to power and its ...
L Lawlit's user avatar
0 votes
1 answer
52 views

Seeking Advice for Improving a Heavy-Duty Unidirectional Conveyor Drive Using a Car Battery (PWM-Driven, Low-Side Switch MOSFET (~60 A, 12 VDC)

I am developing a robust conveyor system powered by a 12 V car battery, which requires handling significant current. Our goal is to integrate a simple yet effective drive with adjustable speed control....
Mark's user avatar
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0 answers
57 views

How do I handle up to 40 Amps continuous current in an ESC (Electric Speed Controller) for my PCB? Specifically heat generation

I have an electric longboard that can consume up to 40 Amps continuously. Here is my schematic: I have a couple questions. Do both the high side and low side MOSFETs experience the same heat ...
Trev347's user avatar
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0 votes
1 answer
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DC high current power supply with fast response time [closed]

I’m looking for a DC power supply that can do 100A at at least 24V but hopefully 60V. The main issue I have is that all the supplies I am looking at seem to have response times in ms where I need to ...
k33g0rz's user avatar
1 vote
3 answers
135 views

How can a transistor in Voltage Follower (Common Collector) mode withstand more than VBE volts across the base emitter junction?

Let me confess before beginning that I am not so professional or expert in this field. I am a self learned hobbyist who learns things from YouTube and applies them in the reality. Having worked with a ...
CoderBittu's user avatar
0 votes
1 answer
98 views

I'm trying to make a DIY 10,000 lumen LED grow light and need some feedback [closed]

I’m trying to make a DIY grow light out of LEDs but I really wanna make sure it’s safe so that I can leave it on unattended. I bought a 12v LED strip but unfortunately there doesn’t seem to be a data ...
plshelpadummy's user avatar
1 vote
0 answers
43 views

Hot-swappable battery in series

I'm trying to figure out a circuit to power a robot with multiple BLDC actuators, with two 6-cell LiPo batteries and would need some advice on safety and possible power switching. Please pardon my ...
Greg's user avatar
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0 votes
0 answers
117 views

What is the best approach to switching heavy loads with parallel MOSFETs?

I am going to build a spot welder with 20 MOSFETs in parallel (datasheet), each one capable of delivering 550A (1.2 kA peak approx.) powered by 35 mm2 cables connected to a 60 Ah 12 V car battery. In ...
Roberto Tascioni's user avatar
1 vote
1 answer
113 views

Control a large array of high-power LEDs with a GPIO pin

I have an array of about 10x10 high-power LEDs driven by a ~200w LED driver. I want to turn on/off the whole array using 3V3 logic with a single GPIO pin on some controller. The 10x10 array consists ...
étale-cohomology's user avatar
0 votes
1 answer
81 views

Is it possible to shutdown SCR when high current is passing through it?

I have a project in which I need a controllable high voltage (400+ V) high current (10+ kA) pulse (from μs to ms.) Obviously FETs won't cut it because the high voltage will destroy the channel of any ...
7E10FC9A's user avatar
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0 votes
1 answer
93 views

An upgrade of a simple welder

I've been needing to get some welding projects done, but am reluctant to cough up $800 or more for a TIG & stick combo welder. However, I have an old simple buzz box welder (basically an oversized ...
Tempus Nomen's user avatar
0 votes
0 answers
59 views

How to deal with very high current to DC motor

I am using a pickup truck starter motor to build a small crane-like loading arm. I want to control the direction of rotation using an H-bridge, however, when I turn on the mechanism the motor has a ...
R Ram's user avatar
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1 answer
88 views

Via sizing in Altium

I am making Vias on my PCB Design in Altium. I had query on how to relate the reference plane opening diameter and the via plating thickness on the Saturn PCB Calculator for my vias in the Altium ...
Andr7's user avatar
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-4 votes
2 answers
96 views

What are the Best Methods for Creating Pulsed DC or AC Current at 2.4 - 2.5 GHz Frequency Range?

Some of you may be aware that UFOs are sometimes recorded emitting microwave radiation. I think they might be using an electromagnetic coil that is being pulsed with DC current or is using AC current ...
Robert Francis Jr's user avatar
1 vote
1 answer
77 views

Polygon vs Traces

I am designing a 4 layer PCB. For high currents in the inner layers, should I use polygons or traces? Trace width can be defined by the current requirement from the trace width calculator but what ...
Andr7's user avatar
  • 275
1 vote
1 answer
163 views

9 kW PWM controller design

I'm designing a 24 V, 350 A, 70 kHz PWM DC brushed motor controller one direction only. Here is what I came up with until now: I will use Pi Pico as the microcontroller it can generate 3.3 V PWM with ...
AhmedH2O's user avatar
  • 360
2 votes
0 answers
67 views

What is the formula for maximum battery pulse vs pulse duration?

I am interested in finding the maximum current a lithium-ion battery can provide for pulses in the order of 50 ms. If my battery can provide 50 A continuously and 120 A for 10 seconds, how can I find, ...
Greg Sorter's user avatar
-1 votes
1 answer
204 views

Is there any problem (EMC/EMI) with routing in parallel on several layer for better performance?

I have a high-current 220-volt AC power trace on my PCB. for this inrush power of want to use this trace parallel to each other. I want to know this way have positive effect? Do this parallel trace ...
user avatar
2 votes
2 answers
274 views

High Switching Coil Current Circuit

I've been working on building a circuit designed to handle a 40 A current with a switching time of less than 1 ms (currently using 500 us). I've attached the circuit for your review. Initially, I ...
Nim4eng's user avatar
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2 votes
2 answers
132 views

Connecting 200 mm² high current cables [closed]

I am working with high voltage (1000+ V) and high current (600+ A) heavy duty cables (200 mm² or more cross-section). I am unable to find a good and clean way to join such cables. I am on the look-out ...
ElectronicsForLife's user avatar
3 votes
3 answers
900 views

8.3 kW DC brushed motor controller thermal management

I'm designing a brushed DC motor controller for an 8.3 kW, 24 V, 350 A forklift motor. I will be controlling only one direction so I'm using a 70 kHz PWM from an MCU. The circuit will be a push-pull ...
AhmedH2O's user avatar
  • 360
6 votes
3 answers
2k views

MOSFETs stabilizing current in coils keeps burning, how to protect them?

I am trying to stabilize the current in coils in my experiment. For that I am using a circuit as in the picture: First section is a fast switch. It is also galvanically isolated from the TTL signal ...
Einaudi's user avatar
  • 63
0 votes
1 answer
83 views

What is the best way to turn off power to motor controller's H-bridge?

I am trying to figure out the best way to implement an emergency shutoff for the H-bridge of a motor controller: My requirement is to turn off the 48V to the drain of the FET based off a signal which ...
Afam Nwokolo's user avatar
1 vote
1 answer
291 views

Is this circuit sufficient?

Firstly I am sorry for this bad drawing but I just got it from the internet. Secondly I'll give a brief idea about the project it is a static switch would be used to drive general loads (inductive and ...
Hazardous Voltage's user avatar
0 votes
0 answers
48 views

Small Fuse for 600VDC with 6kA interrupt current

I'm looking for a 0.1A - 1A Fuse for a 600VDC system with an interrupt current rating of at least 6kA. I found some fuses like the TC-632414, which would fulfil the criteria, but they are quite big. ...
Felix Kunz's user avatar
1 vote
0 answers
60 views

THT power transistor clamp mounting

I have a question regarding mounting THT power transistors (TO220, TO247...). I am building a output full bridge for a welder and I thought about not using PCB at all for the power terminals (D,S). It'...
tomstr21's user avatar
1 vote
1 answer
447 views

X-ray power input and power output Confusion

I was looking at the power calculations of the X-ray machines and found something a bit unusual. As we know the input power must be equal to the output power. Considering an x-ray machine giving an ...
kam1212's user avatar
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1 vote
1 answer
59 views

High current, low voltage pulsed DC transformer

I'm trying to understand the feasibility of a DC transformer that takes a low voltage, high current pulse and converts it to a lower voltage, higher current pulse (with a resistive load on the output)....
Mandias's user avatar
  • 113
0 votes
1 answer
216 views

STM32F407 Heating up, the decoupling capacitors showing short to ground with multimeter but microcontroller seems working fine

I have an stm32f407 which was running okay for like a month. but now i am seeing that whenever I connect power supply the current consumption is very high and the MCU is heating up a lot. The ...
Mir Hamza's user avatar
6 votes
1 answer
224 views

Is this circuit suitable for switching 3 kA? [closed]

So I wish to switch a current of roughly 3 kA on for short periods of time roughly every second. I have created a circuit shown below which I believe will be sufficient but after past failures I would ...
leasthollow's user avatar
1 vote
1 answer
74 views

Over-current/short-circuit protection for the battery bank

I am using a 24 V 100 A additional vehicle alternator for charging my additional battery bank of 24 V. I need an over-current/short-circuit protection for my battery bank. I am considering using a DC ...
James Ross's user avatar
2 votes
2 answers
242 views

Transient output voltage on high-side MOSFET switch upon start up

For my application, I am using 4S10P Li-ion battery (with NXP's RDDRONE-BMS772) to power the following load: 8 ESCs to control thrusters 1 Raspberry Pi with hat to control ROV (powered from 5V buck ...
Quang's user avatar
  • 33
0 votes
0 answers
87 views

HV and LV transformer coupling not working, no current from LV transformer?

I am trying to couple a high voltage transformer (automobile coil) 220 V to 10 kV, with a low voltage home made transformer 220 V to 6, 12 V (think MOT but bigger). I have tested/used the LV ...
user1570144's user avatar
1 vote
1 answer
105 views

High Current Step-Down Conversion 12V-5V/100A

I inherited two 12 V, 1200 W server power supplies a while back and I'd like to press them into service as electrolysis cell power supplies for making (per)chlorates. I need to drop the output to ~5 ...
Franklin Knight's user avatar
0 votes
2 answers
474 views

How to calculate the size of copper strip with high current and high frequency?

We can easily find the recommended cross-sectional area of copper wire when the current is DC. But when the frequency is high, e.g., 13.56MHz, how could we calculate a suitable size of copper strip to ...
Mingan's user avatar
  • 1
1 vote
1 answer
86 views

How to convert low voltage digital signal (0-3.3V) to high power current signal 15-40W ranging from 1kHz to 1MHz?

I need to convert a digital signal generated from a microcontroller GPIO (0-3.3V) to a high-power (15-40W) current signal to drive an LED chip for illuminance, where the signal frequency can range ...
hailstone's user avatar
1 vote
2 answers
144 views

How much resistance do I need to discharge my capacitor without hurting it [closed]

I’m building a coil-gun and I just got a 400 V 1.3 mF electrolytic capacitor which will discharge a large current. However, my coil is made of 1 mm^2 copper enamel wire which has an resistance of only ...
Joshua's user avatar
  • 83
3 votes
2 answers
239 views

Why don't we use the third harmonic in power transmission?

For some high power high voltage lines DC is used with the advantage that sinus wave AC obviously doesn't use the line to it's maximum capacity at all times. To correct this, we could use square wave ...
Čäřý's user avatar
0 votes
1 answer
41 views

Reducing current for 5x5 IR transmitter matrix

I'm currently working on a project that involves a 25 IR transmitter matrix, with each individual IR transmitter requiring around 50mA of current. This results in a total current requirement of ...
Krishna Bansal's user avatar
0 votes
0 answers
46 views

What characteristics should I be looking in to choose a MOSFET?

I have an application which I need to switch a 1000 W 24 V 40 A inverter on, and I do need a way to switch it on with a MOSFET (I don't understand the way how to choose it properly) although in the ...
Hazardous Voltage's user avatar
0 votes
1 answer
120 views

Current limiting in a ESC

How is current limited in high-power circuits such as ESCs, considering that they might provide tens of Amperes of current?
Constlo's user avatar
0 votes
0 answers
47 views

How do I power an inverter using a combination of a car and an external battery but limit the current taken from the car to only 100A?

The car in question is a Nissan Leaf, whose 12V "starter" battery is replenished by an onboard DC-DC converter with a maximum safe output of about 100A (this is used as a handy way to tap ...
LMF5000's user avatar
1 vote
0 answers
77 views

Protection of the power supply input from high voltage pulses

I am assembling a power supply for xenon arc lamps. I use a simple welding inverter as a stable current source. I use the presented scheme. The ignition circuit generates pulses up to 25-30 kV for a ...
Typeof undefined's user avatar
0 votes
1 answer
72 views

Why are pads not connected all way around in copper filled areas? [duplicate]

I'm designing a circuit that will supposedly pass 30A continuous, I assumed the best I can do to prevent tracks from burning is just use copper fill so that essentially the whole area is my high ...
php_nub_qq's user avatar
2 votes
2 answers
266 views

Is it ok to connect a 10000 μF Capacitor to a lithium-ion battery directly?

I have a 24 V lithium-ion battery which will pump as Iᵐᵃˣ 40 A and I need to connect a capacitor directly to the 24 V battery which will be 10000 μF(10 mF). The usage of it is to keep the system ...
Hazardous Voltage's user avatar
1 vote
2 answers
34 views

DC-DC Powering Sensitive IO ICs

I have a high-powered buck DC-DC board with low RDSON FET's (10-20 A) that powers IC's that are sensitive to noise on the IO circuitry. I've done the usual of input/output bypass caps, RC snubbers, ...
electronuts's user avatar
0 votes
1 answer
51 views

Can I connect an off-the-shelf boost converter and a buck converter end to end?

I have a 9~15 volt source (a battery) that I need to turn into stable 12 volts efficiently. The load (a graphics card) will draw up to 200 watts. Can I just get a boost converter and a buck converter ...
Ansis Māliņš's user avatar
1 vote
4 answers
861 views

How to drive high and low side FET with 3.3V microcontroller?

This picture describes the current state of my project that I am working on. I am making a half-bridge high-current motor driver (that will eventually evolve into a full-bridge). The motor is ...
theph's user avatar
  • 176
1 vote
1 answer
107 views

LTspice 1000A simulation

I want to simulate a 1000A current flowing through a circuit in LTspice. The supply voltage is 230V AC @ 50Hz. This circuit will also have 0.05 milliohm in series with the load (this resistor acts as ...
JoeyB's user avatar
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